多选题When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?()Athe query transaction rateBnumeric data versus character dataCextent sizeDthe cardinality of the candidate columnsEprefetch size

题目
多选题
When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?()
A

the query transaction rate

B

numeric data versus character data

C

extent size

D

the cardinality of the candidate columns

E

prefetch size


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更多“多选题When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?()Athe query transaction rateBnumeric data versus character dataCextent sizeDthe cardinality of the candidate columnsEprefetch size”相关问题
  • 第1题:

    By mistake, you ran the batch job (for updating the BILL_DETAILS table) twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify:  a) a list of changes made along with the transaction identifier of each change  b) the necessary SQL statements to undo the erroneous changes  Which option would you choose?()

    • A、RMAN only
    • B、Flashback Table only
    • C、Flashback Versions Query only
    • D、Flashback Database and Flashback Transaction Query
    • E、Flashback Versions Query and Flashback Transaction Query

    正确答案:E

  • 第2题:

    You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEES table. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area.  Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()

    • A、perform point-in-time recovery
    • B、perform a Flashback Table operation to restore the table to the state it was in two days ago
    • C、perform a Flashback Database operation to restore the database to the state it was in two days ago
    • D、perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery

    正确答案:D

  • 第3题:

    Which two statements about Flashback Query are true?()

    • A、It is generated by using the redo log files. 
    • B、It helps in row-level recovery from user errors.
    • C、It can be performed to recover ALTER TABLE statements 
    • D、It fails when undo data pertaining to the transaction is overwritten.
    • E、The database has to be opened with the resetlogs option after performing Flashback Query.

    正确答案:B,D

  • 第4题:

    By mistake, you ran the batch job (for updating the BILL_DETAILS table) twice. You are not sure which rows in the BILL_DETAILS table were affected. You need to identify:  a) A list of changes made along with the transaction identifier of each change.  b) The necessary SQL statements to undo the erroneous changes.  Which option would you choose?()

    • A、 RMAN only.
    • B、 Flashback Table only.
    • C、 Flashback Version Query only.
    • D、 Flashback Database and Flashback Transaction Query.
    • E、 Flashback Version Query and Flashback Transaction Query.

    正确答案:E

  • 第5题:

    You are a database administrator for your company. The company uses a vendor company’s application that is based on a proprietary database. You query data from the application database and import the data into a SQL Server 2005 database. The application vendor provides you with a new OLE DB driver to be used when querying the application database. Company policy prohibits connections between the SQL Server database and the application database, except when querying this data. You need to provide a way to query data from the application database. What should you?()

    • A、Configure a Linked Server connection to the application database.
    • B、Write a query that uses an OPENDATASOURCE command.
    • C、Write a query that uses an OPENQUERY command.
    • D、Configure a Remote Server connection to the application database.

    正确答案:B

  • 第6题:

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. A SQL Server 2005 computer is managed by you, and a database named Customers is included by the SQL Server 2005 computer. A table named CustInfo is included by the database. An identity column named CustID and an nvarchar column named CustName are included by the table. According to the company requirement, rows which duplicate CustName values are included should be moved from the CustInfo table every year. However, the company requests to have rows removed from the CustInfo table after the rows have been manually examined and verified as being duplicates. Since you are the technical support, you are required to think out a method to have potential duplicate rows identified for manual examination. The minimum amount of administrative effort should be utilized.  Which action should be performed to finish the task?()

    • A、A trigger should be created for the CustInfo table so as to roll back INSERT queries that duplicate data is included.
    • B、A new unique index should be created on the CustName column. And then, IGNORE_DUP_KEY = ON should be specified when creating index.
    • C、On the CustName column, a foreign key constraint should be created, and a distinct list of CustName values is referenced by the foreign key constraint.
    • D、A SELECT INTO query should be utilized, and GROUP BY and HAVING clauses should be included by the query to create a new table that contains duplicate rows from the CustInfo table.

    正确答案:D

  • 第7题:

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005. You work as the administrator of a SQL Server 2005 computer, and the computer is called SQL1. There are two databases on the SQL1, and the two databases are respectively named Production and DW. A new database named Staging is created. When the data are moving from the Production database into the DW database, the Staging database is utilized temporarily to store and manipulate data. Since you are the database administrator, you are required to make sure the points listed below. First, the tables should not be removed from the Staging database. Second, any attempts to have tables migrated should be logged. Third, your solution should not impact on other databases.  Which action should be performed to achieve the goal?()

    • A、To achieve the goal, a DML trigger on each table should be created to prevent deletion of data.
    • B、To achieve the goal, a DDL trigger should be created, and that the ON DATABASE parameter is utilized by DDL trigger for the Staging database.
    • C、To achieve the goal, an event notification should be created to fire when the TRUNCATE TABLE Transact-SQL statement is submitted to the Staging database.
    • D、To achieve the goal, a DDL trigger should be created, and the ON ALL SERVER parameter is utilized by the DDL trigger.

    正确答案:B

  • 第8题:

    多选题
    When a database administrator chooses the dimensions for an MDC table, which two characteristics should beconsidered?()
    A

    the query transaction rate

    B

    numeric data versus character data

    C

    extent size

    D

    the cardinality of the candidate columns

    E

    prefetch size


    正确答案: C,D
    解析: 暂无解析

  • 第9题:

    多选题
    You work as a database administrator for Certkiller .com. One of the database users accidentally deleted all the rows of a critical table and committed the delete at 1:30 p.m. You senior database administrator, Certkiller, asks you to retrieve the lost data. Which two actions would you use to ensure that there is no impact on other connected users while retrieving the deleted rows?()
    A

    Use a flashback query to retrieve the rows that were deleted

    B

    Useconventialincremental export and then import the affected object

    C

    Shutdown the database inNORMALmode and restart the database instance

    D

    Use DBMS_META package to reconstruct the object using undo segments

    E

    UseTablespacePoint in Time Recovery (TSPITR) method to recover the table and the data

    F

    Use Oracle DataPumptwithflashback_timeoption toentableflashback export and then import the affected object.


    正确答案: D,F
    解析: 暂无解析

  • 第10题:

    多选题
    Identify two situations in which you can use Data Recovery Advisor for recovery. ()(Choose two.)
    A

    The user has dropped an important table that needs to be recovered.

    B

    The database files are corrupted when the database is open.

    C

    You are not able to start up the database instance because the required database files are missing.

    D

    The archived log files are missing for which backup is not available.


    正确答案: B,C
    解析: 暂无解析

  • 第11题:

    多选题
    Which two statements about Flashback Query are true?()
    A

    It is generated by using the redo log files.

    B

    It helps in row-level recovery from user errors.

    C

    It can be performed to recover ALTER TABLE statements

    D

    It fails when undo data pertaining to the transaction is overwritten.

    E

    The database has to be opened with the resetlogs option after performing Flashback Query.


    正确答案: E,C
    解析: 暂无解析

  • 第12题:

    多选题
    Examine the parameters for your database instance: Which three statements are true about the process of automatic optimization by using cardinality feedback?()
    A

    The optimizer automatically changes a plan during subsequent execution of a SQL statement if there is a huge difference in optimizer estimates and execution statistics.

    B

    The optimizer can re optimize a query only once using cardinality feedback.

    C

    The optimizer enables monitoring for cardinality feedback after the first execution of a query.

    D

    The optimizer does not monitor cardinality feedback if dynamic sampling and multicolumn statistics are enabled.

    E

    After the optimizer identifies a query as a re-optimization candidate, statistics collected by the collectors are submitted to the optimizer.


    正确答案: C,B
    解析: 暂无解析

  • 第13题:

    You work as a database administrator for Certkiller .com. In your transaction application, you have scheduled a job to update the optimizer statistics at05:00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected?()

    • A、Average row size
    • B、Last analyzed date
    • C、Size of table in bytes
    • D、Size of table in database blocks
    • E、Number of free blocks in the free list
    • F、Number of extents present in the table.

    正确答案:A,B,D

  • 第14题:

    You are working on an Oracle Database 10g database. For which purposes would you use the Flashback Transaction Query feature? ()

    • A、 To recover a dropped table.
    • B、 To recover a dropped schema.
    • C、 To recover data from a truncated table.
    • D、 To view changes made by all the transactions during a given period of time.
    • E、 To view changes made by a single transaction during a given period of time.

    正确答案:D,E

  • 第15题:

    You work as a database administrator at Certkiller .com. You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEEStable. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()

    • A、 perform point-in-time recovery
    • B、 perform a Flashback Table operation to restore the table to the state it was in two days ago
    • C、 perform a Flashback Database operation to restore the database to the state it was in two days ago
    • D、 perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery

    正确答案:D

  • 第16题:

    You are building two forms. Each form has a button and a non-base table field. When the button is pressed, a complicated calculation is executed. The calculation is the same for both forms. The calculation code does not query or change the data in the database. When the calculation completes, it returns a single value to the non-base table field. To optimize performance and maintainability, which PL/SQL structure should be used? ()

    • A、A trigger in each form. 
    • B、A subprogram in each form. 
    • C、A stored subprogram in the database. 
    • D、A subprogram in a library that is attached to each form.

    正确答案:D

  • 第17题:

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. A SQL Server 2005 application is utilized by the company. A query is executed by the application to return three columns of the nvarchar data type and one column of the XML data type. A WHERE clause is utilized by the query, and all three of the nvarchar columns are contained by the WHERE clause. 5 million rows are included by the table, and 50,000 rows are returned by the query. The performance of the query should be enhanced. Which action should be performed to achieve the goal?()

    • A、A primary XML index should be created on the XML column.
    • B、Statistics should be created on the nvarchar columns.
    • C、A view should be created, and only the four columns that the query utilizes are contained by a view.
    • D、A composite index should be created on the three nvarchar columns, and INCLUDE should be specified for the XML column.

    正确答案:D

  • 第18题:

    You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions, monitoring the database server, and design deployment. In the company, you major job is the deployment, maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. A vendor company’s application is utilized, and the application is based on a proprietary database. Data is queried from the application database and the data is imported into a SQL Server 2005 database. A new OLE DB driver is offered by the application vendor, and the new OLE DB driver will be utilized when the application database is queried. According the company requirements, the connections between the SQL Server database and the application database is prohibited, except when this data is queried. You should think out a method to have data queried from the application database.  Which action should be performed to achieve the goal?()

    • A、To achieve the goal, a Linked Server connection should be configured to the application database.
    • B、To achieve the goal, a query should be written, and an OPENQUERY command is utilized by the query.
    • C、To achieve the goal, a Remote Server connection to the application database should be configured.
    • D、To achieve the goal, a query should be written, and an OPENDATASOURCE command is utilized by the query.

    正确答案:D

  • 第19题:

    单选题
    You work as a database administrator at Certkiller .com. You are working in an online transaction processing (OLTP) environment. You realize that the salary for an employee, John, has been accidentally modified in the EMPLOYEEStable. Two days ago, the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected?()
    A

     perform point-in-time recovery

    B

     perform a Flashback Table operation to restore the table to the state it was in two days ago

    C

     perform a Flashback Database operation to restore the database to the state it was in two days ago

    D

     perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements, and then use them for recovery


    正确答案: B
    解析: 暂无解析

  • 第20题:

    多选题
    Your database is in NOARCHIVELOG mode. After which two operations you should take the backup of control file?()
    A

    adding a new user to the database

    B

    dropping a user from the database

    C

    dropping a table from the database

    D

    dropping a data file from a tablespace

    E

    adding a new tablespace to the database


    正确答案: D,C
    解析: 暂无解析

  • 第21题:

    单选题
    You are building two forms. Each form has a button and a non-base table field. When the button is pressed, a complicated calculation is executed. The calculation is the same for both forms. The calculation code does not query or change the data in the database. When the calculation completes, it returns a single value to the non-base table field. To optimize performance and maintainability, which PL/SQL structure should be used? ()
    A

    A trigger in each form. 

    B

    A subprogram in each form. 

    C

    A stored subprogram in the database. 

    D

    A subprogram in a library that is attached to each form.


    正确答案: B
    解析: 暂无解析

  • 第22题:

    单选题
    Two database users, Jack and Bill, are accessing the SupportCenter STAFF table of the SupportCenter DB database. When Jack modifies a value in the table, the new value is invisible to Bill. Which is the modified value invisible to Bill?()
    A

    The modified data are not available on disk.

    B

    The modified data have been flushed out from memory.

    C

    The modified rows of the SupportCenter STAFF table have been locked.

    D

    Jack has not committed the changes after modifying the value.

    E

    Both users are accessing the database from two different machines.


    正确答案: C
    解析: 暂无解析

  • 第23题:

    多选题
    Identify two situations in which you can use Data Recovery Advisor for recovery.()
    A

    The user has dropped an important table that needs to be recovered.

    B

    The database files are corrupted when the database is open.

    C

    You are not able to start up the database instance because the required database files are missing.

    D

    The archived log files are missing for which backup is not available.


    正确答案: D,C
    解析: 暂无解析

  • 第24题:

    多选题
    You are working on an Oracle Database 10g database. For which purposes would you use the Flashback Transaction Query feature? ()
    A

    To recover a dropped table.

    B

    To recover a dropped schema.

    C

    To recover data from a truncated table.

    D

    To view changes made by all the transactions during a given period of time.

    E

    To view changes made by a single transaction during a given period of time.


    正确答案: B,D
    解析: 暂无解析